In [1]:

    

import collections


    

In [6]:

    

Card = collections.namedtuple('Card', ['rank', 'suit'])


class FrenchDeck:
    ranks = [str(n) for n in range(2, 11)] + list('JQKA')
    suits = 'spades diamonds clubs hearts'.split()
    
    def __init__(self):
        self._cards = [Card(rank, suit) for suit in self.suits
                                        for rank in self.ranks]
    
    def __len__(self):
        return len(self._cards)
    
    def __getitem__(self, position):
        return self._cards[position]


    

In [3]:

    

beer_card = Card('7', 'diamonds')
beer_card


    

    
Out[3]:





Card(rank='7', suit='diamonds')

In [7]:

    

deck = FrenchDeck()
len(deck)


    

    
Out[7]:





52

In [8]:

    

deck[0]


    

    
Out[8]:





Card(rank='2', suit='spades')

In [9]:

    

deck[-1]


    

    
Out[9]:





Card(rank='A', suit='hearts')

In [10]:

    

from random import choice
choice(deck)


    

    
Out[10]:





Card(rank='6', suit='hearts')

In [11]:

    

choice(deck)


    

    
Out[11]:





Card(rank='4', suit='clubs')

In [12]:

    

choice(deck)


    

    
Out[12]:





Card(rank='9', suit='clubs')

In [13]:

    

deck[:3]


    

    
Out[13]:





[Card(rank='2', suit='spades'),
 Card(rank='3', suit='spades'),
 Card(rank='4', suit='spades')]

In [14]:

    

deck[12::13]


    

    
Out[14]:





[Card(rank='A', suit='spades'),
 Card(rank='A', suit='diamonds'),
 Card(rank='A', suit='clubs'),
 Card(rank='A', suit='hearts')]

In [15]:

    

i = 0
for card in deck:
    print(card)
    i += 1
    if i > 5:
        break


    

    




Card(rank='2', suit='spades')
Card(rank='3', suit='spades')
Card(rank='4', suit='spades')
Card(rank='5', suit='spades')
Card(rank='6', suit='spades')
Card(rank='7', suit='spades')

In [16]:

    

Card('Q', 'hearts') in deck


    

    
Out[16]:





True

In [17]:

    

Card('7', 'beasts') in deck


    

    
Out[17]:





False

In [18]:

    

suit_values = dict(spades=3, hearts=2, diamonds=1, clubs=0)


def spades_high(card):
    rank_value = FrenchDeck.ranks.index(card.rank)
    return rank_value * len(suit_values) + suit_values[card.suit]


    

In [20]:

    

i = 0
for card in sorted(deck, key=spades_high):
    print(card)
    i += 1
    if i > 12:
        break


    

    




Card(rank='2', suit='clubs')
Card(rank='2', suit='diamonds')
Card(rank='2', suit='hearts')
Card(rank='2', suit='spades')
Card(rank='3', suit='clubs')
Card(rank='3', suit='diamonds')
Card(rank='3', suit='hearts')
Card(rank='3', suit='spades')
Card(rank='4', suit='clubs')
Card(rank='4', suit='diamonds')
Card(rank='4', suit='hearts')
Card(rank='4', suit='spades')
Card(rank='5', suit='clubs')